Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84926dfee155812…

MALICIOUS

PDF

43.8 KB Created: 2021-05-12 01:34:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 35f182d20ba2724384333e638eff09a7 SHA-1: 73478f327240240509e6e2bc11469f69e5cd4759 SHA-256: b84926dfee1558129c4c3865a9de7b9eaab6fa13207fdadd23ae3184298bdcb6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free Robux or game hacks. The document body, though partially corrupted, contains references to these lures and embedded URLs. The presence of these links strongly suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/free-robux-thumbnail-game-hack In PDF document text
    • http://neltalen.nl/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/robux-money_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/rewards-robux_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/robux-redeem_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.micIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000465c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x465C 29512 bytes
SHA-256: 425e2402a53ec3d3025f85abe069d4ebf3473fe4144601cf2ad980f06e4a4567
font_01_sfnt_off0000874c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874C 18864 bytes
SHA-256: c969eb26f29950990ddccbf0eeab0a7af3119d1c9c7ebc0fee97903357bc58cd

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